let arr:number[]=[1,5,6]
let arr1:string[]=["ss","lk","yy"]
interface Per{
    name:string,
    age:number
}
let p1:Per={
    name:"yy",
    age:23
}
let p2:{name:string,age:number}={
    name:"yy",
    age:23
}
let id: string | number = "abc123";
type kk={
    name:string,
    age:number
}
let ll:kk={
    name:"zs",
    age:23
}
type ppp1=kk&{id:number}
let lll:ppp1={
    name:"zs",
    age:23,
    id:1
}
let e1:unknown=56.66666
console.log((e1 as number).toFixed(2))
